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SUMMARY:Patrick Orson (Boston College)
DTSTART:20200522T150000Z
DTEND:20200522T163000Z
DTSTAMP:20260423T005747Z
UID:CIRGET/3
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CIRGET/3/">T
 opologically embedding spheres in knot traces</a>\nby Patrick Orson (Bosto
 n College) as part of CRM - Séminaire du CIRGET / Géométrie et Topologi
 e\n\n\nAbstract\nKnot traces are smooth 4-manifolds with boundary\, that a
 re homotopic to the 2-sphere\, and obtained by attaching a 2-handle to the
  4-ball along a framed knot in the 3-sphere. I will give a complete charac
 terisation for when the generator of the second homotopy group of a knot t
 race can be represented by a locally flat embedded 2-sphere with abelian e
 xterior fundamental group. The answer is in terms of\nclassical and comput
 able invariants of the knot. This is a joint project with Feller\, Miller\
 , Nagel\, Powell\, and Ray.\n
LOCATION:https://researchseminars.org/talk/CIRGET/3/
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